From our music systems to our computer systems to our answering machines, we have come to rely on the ability to store information and retrieve it at a later date. Many of these devices rely on a phenomenon called electromagnetic induction. This section will study the phenomenon and learn how it comes into play in many forms of technology.
EM Induction Investigation
Cassette Tape Simulation
Hard Drive Dissection
Bar Code Activity
Photocell Investigation (demonstrate photoconductivity with cadmium sulfide cells and multimeters; show Dave's Whizzy Periodic Table for the concept of electron shells; show Conductivity phet sim; refer to Cadmium, Sulfur, and Cadmium sulfide articles on Wikipedia to show molecules have different properties than their atomic constituents.
S8.C.2.1 Describe energy sources, transfer of energy, or conversion of energy.
S8.C.2.1.1 Distinguish among forms of energy (e.g., electrical, mechanical, chemical, light, sound, nuclear) and sources of energy (i.e., renewable and nonrenewable energy)
S8.C.2.1.2 Explain how energy is transferred from one place to another through convection, conduction, or radiation.
S8.C.2.1.3 Describe how one form of energy (e.g., electrical, mechanical, chemical, light, sound, nuclear) can be converted into a different form of energy.
S8.C.3.1 Describe the effect of multiple forces on the movement, speed, or direction of an object.
S8.C.3.1.1 Describe forces acting on objects (e.g., friction, gravity, balanced versus unbalanced).
S8.C.3.1.2 Distinguish between kinetic and potential energy.
S8.C.3.1.3 Explain that mechanical advantage helps to do work (physics) by either changing a force or changing the direction of the applied force (e.g., simple machines, hydraulic systems).
Enduring Understandings
From our music systems to our computer systems to our answering machines, we have come to rely on the ability to store information and retrieve it at a later date. Many of these devices rely on a phenomenon called electromagnetic induction. This section will study the phenomenon and learn how it comes into play in many forms of technology.
References to PDE Academic Standards, Anchors, and Eligible Content
Working Draft of Learning Objectives: Students will be able to...
*Working Draft of Essential Learning Activities/Strategies/Technologies
Working Draft of Supplemental Learning Activities/Strategies/Technologies
Resource Materials:
http://electronics.howstuffworks.com/cassette.htm
http://blog.wired.com/gadgets/2007/05/videothe_imposs.html
Text- Science Spectrum
Hard Drive "Dissection" Kits
Online EM Induction Simulation
Online Hard-Disk "Dissection"
Online Decimal to Binary Converter
Instructional Objectives:
Electromagnetic Induction- Predict the effects of moving a magnet near a coil, or vice versa.
Magnetic Tapes- Describe a method for magnetizing a substance with an electromagnet.
- Describe the coding of sights and sounds into magnetic tapes.
Binary CodesReflective Disks
- Describe the photoelectric effect.
- Describe the coding of sights and sounds into optical disks.
Flash MemoryEssential Learning Activities/Strategies/Technologies:
EM Induction InvestigationCassette Tape Simulation
Hard Drive Dissection
Bar Code Activity
Photocell Investigation (demonstrate photoconductivity with cadmium sulfide cells and multimeters; show Dave's Whizzy Periodic Table for the concept of electron shells; show Conductivity phet sim; refer to Cadmium, Sulfur, and Cadmium sulfide articles on Wikipedia to show molecules have different properties than their atomic constituents.
Supplementary Learning Activities/Strategies/Technologies:
Technology Integration:
Electromagnetic simulation-PhETAssessments:
Prior Learning:
S8.C.2.1 Describe energy sources, transfer of energy, or conversion of energy.- S8.C.2.1.1 Distinguish among forms of energy (e.g., electrical, mechanical, chemical, light, sound, nuclear) and sources of energy (i.e., renewable and nonrenewable energy)
- S8.C.2.1.2 Explain how energy is transferred from one place to another through convection, conduction, or radiation.
- S8.C.2.1.3 Describe how one form of energy (e.g., electrical, mechanical, chemical, light, sound, nuclear) can be converted into a different form of energy.
S8.C.3.1 Describe the effect of multiple forces on the movement, speed, or direction of an object.